US Patent Issued to BIOFRIGAS SWEDEN on May 20 for "Method and system for the production of liquid biogas" (Swedish Inventors)

ALEXANDRIA, Va., June 16 -- United States Patent no. 12,305,137, issued on May 20, was assigned to BIOFRIGAS SWEDEN AB (PUBL) (Gothenburg, Sweden).

"Method and system for the production of liquid biogas" was invented by Roger Karlsson (Ytterby, Sweden) and Marcus Benzon (Lindome, Sweden).

According to the abstract* released by the U.S. Patent & Trademark Office: "Methods for the production of liquid biogas (LBG) are disclosed. The methods may include the following steps: -inflow of crude gas comprising mainly methane and carbon dioxide; -removal of trace elements like hydrogen sulphide, siloxanes and VOC's from the crude gas; -dehumidification; -particle purification; for the production of a treated biogas; separation of carbon dioxide fr...